focal crossover stops when it’s cold

Hi every one. I am new here but not new to car audio. I got a set of Focal 165 a1 component speakers and installed them on my 08 civic along a BOSS 4 channel amp and an Alpine 9884 HU. So here is what I need help with. When it is cold I loose sound from my woofers. I have checked the wiring and all is good. I bypass momentarily the crossover and feed the woofers with the amp output and they work fine. Sometimes Id I go ahead and rewire the crossover all works fine. I did not drive my car for 4 days and when I got in it the woofers were dead again. Any ideas? Secondly, I have the notorious "pop" sound coming from my speakers, especially the coaxial Alpines in the rear deck. I have grounded the amp where the factory had grounded some devices also. Any ideas? I appreciate your help in advance.

I meant to mention that the poping noise is heard when the car is turned on or off. Sorry :)

Here is an update... the poping sound from my speakers was due too poor remote turn on lead. I was using a 12volt out from my fuse box, that was causing it. I moved my remote turn on to the remote turn on from the head unit. All is good now. As far as my crossovers, I went ahead and checked again my terminations. Recut and solder tipped the leads before screwing them on the crossover. All works well now. I have to see what happens over night since it seamed that the cold was causing the issue. I still would appreciate input on the regard though. Thank you in advance and I hope that my findings help you guys out.

Boss and Focal in the same sentence? Do yourself a favor and buy a better quality amp. It is just painful to think your running a better than average comp set off a cheeze amp. Not a focal fan but still painful.

If ZED did make a run of Boss it had to have been 85' maybe? I knew about the ESX, Hifonics, Lanzar, Crunch, Nakamichi, US amps. There are a few more but Boss wasn't one of them. Were they Steve Mantz designed or just constructed by ZED?

I am returning the Boss. Since my budget is so small I could only afford another 4 channel Pioneer GM-4300F. Are they any good? What would one recommend as a descent amp for a small budget? Cheers

They were very recent.  Steve did design and has some of them left, he frequents another forum that I visit, he is (was) trying to sell them for cheap.  It was a few months ago. 

never heard of this before. however you can take a soldering iron and just heat up and add a little solder to all the connections on the crossover there might be a bad solder joint. check all conections.Jon

Installer/Help Technician

---coral springs florida---

mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.

I have checked all connections and solder tipped the wiring to the crossovers. I will take the crossovers a part and check and see what is going on... Wired!Thanks....